UMA Racing Valve Springs (R1/R3 cams) - Yamaha T135/T150

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UMA Racing aftermarket valve springs ensure linear tension under fast compression when using high lift camshafts, and are stiffer to prevent valve float at high engine RPM. This set of valve springs are recommended for use with the UMA R1/R3 Spec performance camshafts or those with similar lift.



  • Spring 2.8mm
  • Free Length: 47.5mm
  • Set Length: 32.3mm
  • Stroke: 10.9mm


Fitting (other):

YZF-R15/R125/MT-15/MT-125/WR125/Fz150i Vixion


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